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How to repair Contact service or repair downgraded 2310 to 1600 and add Radio feature again to it.

Start MTB NK software
Check Extras and select Custom erase
in field Our goes to security EEPROM area enter address

013f0000 013fffff

Press Erase selected

this operation will take 5-7 seconds

Now full flash the phone
After flash go to Extras and EEPROM (PMM) Read/Write
load PM file and press Write all
Set phone to factory default
Now unlock the phone